Married First, Loved Later : A Flash Marriage with My Ex's 'Uncle' - Chapter 343: A Habit of Cheating

Take over a Homeworld mothership and travel to the world of Star Wars?

Tang Xiao: “This world is so dangerous. Mom, I want to go home.”

Wait a minute, the mothership database actually has “Original Sin of the Solar Empire”, “Halo”, “EVE”, “StarCraft”, “Stellaris”? ?

And there are still Jim Raynor, Master Chief, and Archbishop Artanis sleeping in the freezer?

Tang Xiao: “Humph! They will all bow down at my feet!!”

The Fourth Calamity… ah no, long live the Fourth Empire!

- Description from novelbuddy

Travel to the primitive world, open up wasteland and farm land, tame animals and fish, build houses…

Jiang Xuan wants to create a tribe of his own!

- Description from novelbuddy

A scientific genius named Thomas Harrier was transmigrated to an imperial prince body after a car accident that took his life. He found out that he is in a world similar to our own with a timeline akin to early twentieth century. The body that he is occupying was the imperial prince of a failing empire who suddenly rose to power after a successful assassination attempt of his father. Unaware that the attack is just the beginning of what is to come. He faces many challenges throughout. Will Thomas Harrier be able to live his second life in peace while running an empire and getting it back to its former glory? Or will he succumb into a conspiracy lurking within the country's borders?

Expect some:

Cold war era techs.

Super battleship with advanced electronics, propulsion, and fire control systems?
Helicopters?
Missiles?
Modern medicines and equipment?
AC-130?
A nuke?
Challenger or Abrams or Leopard?
F-4 Phantom or MIG-21?
Colored TV's.

Everything!!!

PS. Cover not mine, I just found it on google.

In Academy City, magic and science coexist in an unwavering power struggle. Toma Kamijo, an academically-challenged student in Academy City, wields the power of the Imagine Breaker in his right hand, which allows him to completely negate all supernatural powers – as well as his own luck. When he happens upon a mysterious nun named Index, whose mind has been implanted with the Index Librorum Prohibitorum – 103,000 ancient texts banned by the Church – Toma’s luck is about to be pushed to its limits when he finds himself in the middle of a war he never expected!